New even parity fine structure energy levels of atomic vanadium

Four new fine structure energy levels of atomic vanadium have been discovered for the first time. Experiments
were carried out with laser-induced fluorescence spectroscopy and optogalvanic spectroscopy using tunable
continuous wave lasers in the wavelength ranges between 750 nm and 850 nm and between 590 nm and 650 nm,
respectively. The new levels, all lying in the 42 00 to 49940 cm^-1 energy range, were each experimentally
confirmed by two or more observed transitions involving previously known energy levels. Accurate energy level
values were found using lines measured by Fourier transform spectroscopy. The values for the total angular
momentum quantum numbers J of the new levels were found by the analysis of the hyperfine structure of the
spectral lines investigated. Magnetic dipole hyperfine structure constants A for all new levels were determined.
Additionally, for one previously known energy level the magnetic dipole hyperfine structure constant A from the
literature was corrected.